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https://github.com/zephyrproject-rtos/zephyr
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8f321b48ac
Instead of finding the address of the spurious irq function in the intList section we now rely on the linker to find the address in the _irq_spurious symbol. This is a migration from using code generation to using the C language which we in the general case we should aways strive towards. In this specific case it makes the generated code 'irq_tables.c' easier to read as we replace magic numbers with the &_irq_spurious token. Also, the path through the build system that _irq_spurious makes is much shorter, so it is much easier for a user to understand how it is used. Signed-off-by: Sebastian Bøe <sebastian.boe@nordicsemi.no>
69 lines
2.0 KiB
C
69 lines
2.0 KiB
C
/*
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* Copyright (c) 2017 Intel Corporation.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <toolchain.h>
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#include <linker/sections.h>
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#include <sw_isr_table.h>
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#include <arch/cpu.h>
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#if defined(CONFIG_GEN_SW_ISR_TABLE) && defined(CONFIG_GEN_IRQ_VECTOR_TABLE)
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#define ISR_WRAPPER (&_isr_wrapper)
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#else
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#define ISR_WRAPPER NULL
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#endif
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/* There is an additional member at the end populated by the linker script
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* which indicates the number of interrupts specified
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*/
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struct int_list_header {
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void *handler_ptr;
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u32_t table_size;
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u32_t offset;
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};
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/* These values are not included in the resulting binary, but instead form the
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* header of the initList section, which is used by gen_isr_tables.py to create
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* the vector and sw isr tables,
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*/
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_GENERIC_SECTION(.irq_info) struct int_list_header _iheader = {
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.handler_ptr = ISR_WRAPPER,
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.table_size = IRQ_TABLE_SIZE,
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.offset = CONFIG_GEN_IRQ_START_VECTOR,
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};
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/* These are placeholder tables. They will be replaced by the real tables
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* generated by gen_isr_tables.py.
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*
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* _irq_spurious is used as a placeholder to ensure that _irq_spurious
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* is not optimized out in the first link. The first link must contain
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* the same symbols as the second one for the isr_tables generation to
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* work.
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*/
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/* Some arches don't use a vector table, they have a common exception entry
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* point for all interrupts. Don't generate a table in this case.
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*/
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#ifdef CONFIG_GEN_IRQ_VECTOR_TABLE
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u32_t __irq_vector_table _irq_vector_table[IRQ_TABLE_SIZE] = {
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[0 ...(IRQ_TABLE_SIZE - 1)] = 0xabababab,
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};
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#endif
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/* If there are no interrupts at all, or all interrupts are of the 'direct'
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* type and bypass the _sw_isr_table, then do not generate one.
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*/
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#ifdef CONFIG_GEN_SW_ISR_TABLE
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struct _isr_table_entry __sw_isr_table _sw_isr_table[IRQ_TABLE_SIZE] = {
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[0 ...(IRQ_TABLE_SIZE - 1)] = {(void *)0x42, (void *)&_irq_spurious},
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};
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#endif
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/* Linker needs this */
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GEN_ABS_SYM_BEGIN(isr_tables_syms)
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GEN_ABSOLUTE_SYM(__ISR_LIST_SIZEOF, sizeof(struct _isr_list));
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GEN_ABS_SYM_END
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